149642388 has 72 divisors (see below), whose sum is σ = 434703360. Its totient is φ = 42517440.

The previous prime is 149642387. The next prime is 149642399. The reversal of 149642388 is 883246941.

It is a happy number.

149642388 is a `hidden beast` number, since 149 + 6 + 423 + 88 = 666.

149642388 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

149642388 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149642387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46578 + ... + 49686.

Almost surely, 2^149642388 is an apocalyptic number.

149642388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149642388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217351680).

149642388 is an abundant number, since it is smaller than the sum of its proper divisors (285060972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149642388 is a wasteful number, since it uses less digits than its factorization.

149642388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317 (or 3312 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 149642388 is about 12232.8405531994. The cubic root of 149642388 is about 530.9067047515.

The spelling of 149642388 in words is "one hundred forty-nine million, six hundred forty-two thousand, three hundred eighty-eight".